[issue21871] Python 2.7.7 regression in mimetypes read_windows_registry

[agolde]

New submission from agolde:

Python 2.7.7 seems to contain a regression of issue #10162 as compared with 2.7.6, re-introduced by the fix of issue #9291.

import mimetypes
mimetypes.init()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Program Files\INRO\Emme\Emme 4\Emme-4.1.3\Python27\lib\mimetypes.py",
 line 348, in init
    db.read_windows_registry()
  File "C:\Program Files\INRO\Emme\Emme 4\Emme-4.1.3\Python27\lib\mimetypes.py",
 line 256, in read_windows_registry
    with _winreg.OpenKey(hkcr, subkeyname) as subkey:
WindowsError: [Error 5] Access is denied

Whereas with Python 2.7.6 on the same system, this doesn't generate any errors.

It looks like in Python 2.7.6, "with _winreg.OpenKey(hkcr, subkeyname) as subkey:" was within a try-except which was moved with the patch for issue#9291 in Python 2.7.7

----------
components: Library (Lib), Windows
messages: 221553
nosy: agolde
priority: normal
severity: normal
status: open
title: Python 2.7.7 regression in mimetypes read_windows_registry
type: behavior
versions: Python 2.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21871>
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